I made knex toys for little kids. I made a unicycle, car, plane, and a motorcycle. The car is aerodynamic. And the motorcycle is just a fun toy to play with, and it doesn't use much pieces. The plane is probably the hardest to make but the sturdiest of them all. Only the courageous and bravest may go on the adventures of the knex plane. The unicycle is the easiest to make. The unicycle could be the base of many knex toys to come, it's the perfect inspiration starter. Rate, comment and enjoy!