Puppies tussle in the annual Puppy Bowl. Kids start a game of tag in a schoolyard. Play has been observed and documented in many species — and not just in mammals. However, according to Dr. Michael ...

Looking for a way to keep your kids engaged and gadget-free? These 50+ simple and funny riddles are just right for igniting ...

Tickle Kids: The laughter and cute antics of young children win everyone's hearts. Sometimes, people tickle them to cheer them up or make them laugh. We assume the child is enjoying themselves and ...

(CNN) — Editor’s note: Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Puppies tussle in the annual ...