Best Toy Interlocking Gear Sets of 2025

"I absolutely love Brain Flakes! I discovered them online, and I appreciate that they're made in the USA and of great quality. My son and I have so much fun building together!"

"I bought these for my daughter when she was 3 years old, and they instantly became her favorite toy. She can play with them for over an hour, really sparking her creativity!"

"I got these for my 3-year-old granddaughter. The storage bucket is decent, though the lid tends to come loose. Overall, there are plenty of colorful pieces and my granddaughter enjoys connecting them."

"I bought this for my very curious great granddaughter, hoping she would have fun and learn with it. So far, we've been thrilled!"

"This gear set is an excellent STEM toy! My child enjoys creating various things with it, and I highly recommend it!"

"My son received this for Christmas. Despite it being taped up and pre-opened, he loves it! He builds endlessly and enjoys making the gears move."

"My 5-year-old son had a robot-themed birthday, and this toy has been his favorite! He plays with it daily, building something new each time. It’s amazing to watch his imagination at work. I was hesitant at first, but buying it on sale was a great decision. The set includes instructions for four robots, but the possibilities are endless! The pieces are durable, surviving rough play, although a few track links broke when he tried to unlink them. Even at full price, it’s an ideal gift for creative kids!"

"My 4-year-old grandson is so enthusiastic about this set! He does need some help to build the robots, but that’s a wonderful opportunity for us to spend quality time together. We’ve had a blast building alongside him. It really encourages family fun!"

"I got this kit as a gift to spark my child's interest in robotics. It was straightforward to assemble, and the build quality is impressive—definitely sturdy enough for kids. We didn't encounter any missing parts or problems, which made the experience even better!"

“I bought this set for my 4 and 2-year-old grandchildren knowing it contained only one size gear. We ended up having so much fun playing with it together that we didn’t even use the expansion set! The 2-year-old loved building gear layouts, while the 4-year-old and I had a friendly competition to create the most adventurous machine. This set is massively fun on its own, and I can see myself happily expanding our collection in the future.”

“I purchased this gear set as a birthday present for my nephew two years ago, and he still plays with it every day. It has been a fantastic gift!”

“This toy is of high quality and great for fostering creative play. However, I often wish the connectors allowed for more versatile building, like turning corners or constructing up and over. Despite this, the toy remains really fun and offers great potential for learning about gears.”

“I bought this for my almost 6-year-old son for Christmas, and he absolutely loves it. It offers great STEM activities and provides lots of fun. His 12-year-old brother also enjoyed making it. We get at least 45 minutes of playtime and peace as adults!”

“I got this for my 6-year-old nephew, and he is thrilled with it! It’s an excellent gift that truly engages him.”

“My grandson is really enjoying this set. He was able to put together a couple of gears immediately, but I know it’ll take him some time to follow the instructions for the suggested models. What matters is that he’s happy to experiment and learn the basic principles.”

"I bought this for my 3-year-old grandson who loves gears. I was surprised to find it has a motor! You can build it any way you like, and the motor makes the gears spin. He absolutely loves it, and the price is just right!"

"I purchased two sets of this amazing toy for my kids. They enjoy rearranging the gears in different ways. However, one set had a piece that looked melted, and the platform pieces are a bit fragile. Still, it's a great toy for the price!"

"My son's occupational therapist brought this over and he was so excited, especially when he saw the gears spin. I ordered one for him, and when it arrived, his face lit up! Now he plays independently and is completely obsessed!"

"Our son was magnetically pulled towards this set at a museum. After getting his own set, he plays with it almost daily. My husband and I think it’s one of the best toys we've purchased. We began with pre-assembled chains to help him learn, and now he can create whatever he imagines. Just the other day, he proudly built a 'double bus'. The pieces stay together nicely even when not pushed tightly, showing great design for children’s dexterity. I would definitely recommend this toy!"

"I got this for my nephew's 3rd birthday. While I don’t have a picture of him playing, he seems to enjoy just carrying the gears around. He does struggle a bit with connecting them, but it’s a good quality toy overall. It might be a tad challenging for a child just turning three."

"I received this as a Christmas gift for my son, and we absolutely love it! It’s very easy to create different structures with the gears. Plus, it's quite sturdy, which is a big plus."

“I bought the TOMYOU 200 Pieces Building Blocks for my granddaughter, and she absolutely loves them! The vibrant colors and endless possibilities for creativity keep her entertained for hours. The pieces are sturdy and easy for little hands to work with, making them perfect for imaginative play. This set is a fantastic gift and a wonderful way to encourage learning through play!”

“We purchased the 200pc set while on sale, and they have the potential of being great. The creativity, great size, and colors are definite pros, and they come in a storage container. However, my 5-year-old, who has excellent fine motor skills, finds these tricky to snap together. I had hoped they would loosen up, but after a few weeks, he gets frustrated and needs my help. I think these are a great buy and plan to keep them until he’s a bit older.”

“My daughter absolutely loved it! It’s fun for kids and a great value for your money. We’ve had hours of fun with these building blocks!”

“I bought this for my 9-month-old great-granddaughter for Christmas. She loved it, and even at 17 months, she remains fascinated. The colors are bold, and it’s a great investigative toy without any digital features. I highly recommend it!”

“When I first opened this toy, my 4-year-old and 17-month-old were immediately engaged. The bright colors caught their attention, and my older child found the caterpillar amusing. The cause-and-effect relationship it teaches is fantastic, making it a worthwhile purchase.”

“This toy is just what I wanted for my great-grandson. He was in awe of the brightly colored gears. Knowing the Melissa and Doug brand, this item truly exceeded my expectations. A definite thumbs up!”

"As someone who works with young children, I’m always looking for Montessori-style activities. I was initially concerned that this toy might be too bright or garish, but it's actually very pretty and operates smoothly, which is great for little ones. It's very sturdy, and I plan to buy more as gifts!"

"I find this gear toy to be very well made. The colors are vibrant, the edges are smooth, and the wood is solid. The gears move effortlessly, which is impressive!"

"My son, who has sensory issues and loves to spin, absolutely adores this toy! He plays with it every single day, multiple times a day. It’s truly worth the investment!"