A children's homemade "busy board." This started with an Ikea As-Is cabinet door for only 5 dollars, add an abacus and a few fine-motor gadgets & its endless fun!
Lock-And-Key Busy Board. $37.00, via Etsy.
18 Awesome Homemade Toys for Toddlers - Fine Motor Skill Activity Board
homemade busy board: light switch, boing-ing door stopper, latches, chain lock, hook and eye, hinged doors, spinning wheels, bolts, door knob...
domesticesq - babys gift to big brother: latches board Saw the link to this on another pin that linked to "craftgawker" saying, "Make your little boy a latches board. Takes just imagination, a drill, and a trip to the hardware store..."
DIY Mini foosball table - shoebox, clothespins and a ping pong ball