I wanted to see if there were any suggestions for easy (to buy or make) 'devices' to help have fun ... like things from a hardware store that can be re-purposed as a simple gunge tank, or something that will push slop out onto someone easily etc.

I have 100L worth of gunge/slime from Messy Supplies, and a great guy to dump it on. The only space I have is my bathroom, which has a bath and a separate shower; so can't be too clunky to assemble etc

I also have 10 buckets (to hold 10L each), some welly boots, and a Messy Supplies slime shooter.

Any device/gadget suggestions welcome!