The hot wheels Slime Volcano Set is a massive set.
We purchased it second hand and the kids have mucked around with it.
I think there are some parts missing but as a 42 year old dad I cannot tell you which parts

My 9 year old on the other hand could give you a blow by blow breakdown of the whole deal.

So it's Buyer beware.... This will suit someone who may have parts they can add to it

Happy bidding