These were a Christmas gift for my 7 year old son who loves to build. The syringes act as hydraulics, moving the sturdy plastic erector set pieces. Add gears and wheels and you have amazing moving contraptions! My son loves them! I would definitely recommend these for a child who likes to build and figure out how things work.

This was a hit for my 4th grader! They were able to make so many different things.

My STEM students love the Gadgets and Gizmos kit. Perfect for first grade and above. It allows for creative inventing for the younger students, but also provides directions for varies projects that the older elementary students love too. I highly recommend them. Im fact, I love them so much that Im ordering a couple more kits so that I can have several groups working on these at once.

Great toy for learning how to build things using simple pieces and things around the house.