That's cool, Joy!
So I did hang out with my niece and nephew. My stories aren't as funny, though, and probably only cute because the kids are related to me. But...
The nephew, six, was running around the yard, jumping and tumbling and stuff, when I arrived. He shot out to greet me and, in passing, mentioned he'd hurt his foot earlier. He continued to run and jump off furniture and wrestle the dog, right up until we had to go out to dinner. When Mom tried to put shoes on him, he started screaming and crying. He didn't want anything to touch his toes because they hurt so badly. So my sister wrapped his foot in an ace bandage so he wouldn't be completely barefoot (couldn't even bear a sock).
We were a bit worried he'd broken his toe because thereafter, he wouldn't put his foot on the ground and insisted on hopping around on his good foot. We got everyone in the car and got to the restaurant, and he was still teary-eyed. When he spotted the handicap ramp, he said, "Mom? I think I should take the ramp. I really think that's what'll be best for me right now."
More hopping around. Then when we got home, he insisted he needed a cane. So they got out a cane and put it on the shortest setting. Within five minutes he was jumping on the furniture and using the cane as a lightsaber.
But at the restaurant, while they were still trying to figure out how badly he was actually hurt, he decided he wanted to ride his bike when he got home, and my BIL asked how he planned to ride with just one foot. So my niece, ten, explained how you do that (pushing down hard with the one foot while you're going fast enough).
BIL said, "I'm not sure you can do that with training wheels. You have to hop along beside the bike and try to get it going fast enough, and then you try to hop on... if you make it, you make it. If you don't, though..."
And she was staring at him, wide-eyed and dire looking, and whispered, "... you die?"