When a child receives silly putty, make sure that said putty doesn’t go to bed with him. It’s worse than gum because it spreads like peanut butter once it warms up. Then, when it cools again, ick.
And, if you’ve unveiled above wisdom, don’t assume that a lost bit of silly putty is actually led by gravity all the way under the bed.
(Guess who got to extract silly putty from clothing two nights in a row.)