Please Do Feed the Bears — Phyllis Reynolds Naylor

Percy's family is going on a picnic, and he can't imagine being at the beach without his favorite stuffed animals. There's his teddy, his grizzly, his old black bear, his panda...

But the car is jam-packed, and his family warns him that there isn't room. In order to bring his bear family, they'd have to leave something behind.

And so, without thinking it through, Percy leaves something behind, with disastrous results. But in the end, Percy and his bears save the day.