Need some fun bulk gift ideas for adults

I have a group of about 20 people that I'm doing gifts for this year. I'm making custom mugs with their name on it, and then filling the mug with fun things, like homemade candy, cookies, etc. The idea is that it's going to be kind of like a gift basket. I'm going to wrap it in cello wrap and do bows and everything.

Something I like to do with gifts like this is include two or three things that, as adults, we don't really get anymore but are still kind of fun. Like those bouncy balls that light up, or fidget spinners, or slap bracelets, or those washcloth discs, or fun socks, or matchbox cars... Stuff like that.

So yeah, I was wondering if anybody had some ideas on fun things to include. I'd love to be able to buy them bulk, and I definitely don't want to pay a ton of money. Price range is equivalent for what I mentioned above, like buying 20 in bulk shouldn't be more than $20-$30