I've been working with this in VRChat actually, though sometimes it's by accident. I have a pair of Drop Labs EP-1 shoes (https://droplabs.com/pages/product-overview), which take audio signals and redirect them to transducers in the shoe soles. Since I'm feeding in audio from VRC, it means I can feel people talking in my feet, which is... a very odd sensation. Especially when they laugh. - Source: Hacker News / over 2 years ago

A pocket synthesizer/loop device example. Source: 6 months ago

The circuit board thingy next to it is a Teenage Engineering Pocket Operator PO-33KO - which is a mini sampler/sequencer: https://teenage.engineering/products/po. Source: about 1 year ago

However, it also sucks that a lot of other companies tend to price-out newcomers. But that said, and I've noticed people are quick to forget in this kind of conversation: a lot of those same companies have gear for under $100 (yes, even Teenage Engineering). I know pro-composers/music producers who use this stuff professionally and swear by them. Source: about 1 year ago

Beyond a toy like that, there's also standalone music making gear that might be for fun for kids (and adults) to play with and probably won't hurt your wallet that much, specifically the Pocket Operator line of synthesizers. Source: about 1 year ago

On left is a rack of Volcas - looks like a Sample, Bass and Mix. Below that is a Model:Samples from Elektron. To the right of those is a mini rack of Teenage Engineering Pocket Operators. Source: about 1 year ago