I remember seeing rubber balls about the size of a bocce ball filled to a high pressure with helium. Not enough buoyancy to float, but they definitely took off when you chucked it at the ground
Kinda reminds me of the Bone comics by Jeff Smith. I don't know if they were popular or not but I used to get them from the library all the time as a kid
I've actually been looking at getting an e board for my 4 mile commute to work. I've been researching reviews to decide on a board with good reliability and ride comfort primarily, and the flex has come up often. Any especially good or bad experiences with it?
If you're ever in Stockholm, there's a whole museum dedicated to the Vasa. Definitely worth a visit. The ship is way bigger than you think