Gilbert Chem Set - can't have that anymore, sodium cyanide
Erector Sets - Nope, sharp edges on stamped steel
Cap guns/ Caps - Uh, uh. Danger of hearing loss. Especially if you strike a whole roll of caps with a rock
American Brick - Are you kidding? Did you ever step on one in your bare feet?
Lincoln Logs - Splinter hazards
Gas engine airplane - Fuel causes halucinations. Prop kicks back on starting cutting fingers
Bicycle - Not without a Snell Approved helmet
Lawn Darts - Death from Above
Model Cars - Not without an adult so you don't huff the Testor's
Slip N' Slide - Need a rider for Mom and Dad's liability insurance
BB Gun - "You'll Put Your Eye Out"
No wonder today's kids can only play video games
My favorite game was to tie a long string to the axle of my Erector set motor with the other end tied to a rubber tank. I'd build obstructions made of American Brick walls and Lincoln Logs manned by hundreds of army men laid out along the track of the string. Start up the electric motor and as it reeled in the tank, mayhem would ensue. No obstacle could stop the torque of that Erector set motor.