My son said he wanted to play a new character based on warping space and I said...
I just happen to have written a class specialized in teleportation and spatial manipulation in the past
... and after looking at it, he said it was perfect. So we started a new game... He's playing a 3rd level star elf warper, and my daughter is starting out playing a 3rd level oslecamo nymph, although she may change over to an agraramel (time thief... the other custom class in the link) at some point. I included an NPC agraramel that I'll offer her to take over at the next game time (it's an anthropomorphic rabbit that's been warped by the Far Realm.... and I will use some custom stats for a choker for it's race.... saying that it can extend and grapple with its ears, and distend its mouth open for a nasty bite...).
Their first adventure took them through a mysterious portal into a demiplane that was inspired (ripped off) from Lewis Carol's Alice In Wonderland... and the final BBEG was a Gibbering Mouther Red Queen... which they easily (too easily...) defeated.