Playtime with Friends Series by Kit Chase

A board book about three adorable best friends!Oliver, Charlie, and Lulu love to play outside together. Their favorite game is hide-and-seek, but it's not fun for Oliver when his friends hide in the trees--he can't reach them! So the friends set off to find a tree that Oliver can play in.But there's a reason we don't see elephants in trees, and just when Oliver is ready to give up the search, Charlie and Lulu surprise him with the perfect tree for them all to play in together!