DS 3 loves filling and pouring with water and sand etc and loves painting too. But as for plunging his hands into jelly or gloop for no apparant reason -forget it.
Children's centre sometimes has activities like a huge tray of weetabix(s) with a jug of coloured water. DS will pick up jug and pour water out all over weetabix, mix it for about 5 seconds with a big spoon and
that's it. No way will he put his hands in. And what's the next child supposed to do? The fun's in the pouring and that's done. Are they expected to swim in it?
Rice Krispies in same mahoosive sized floor tray with a few squirts and squiggles of paint over them? To mix I think, but DS not interested.
Jelly with plastic animals in? He'd rather the animals without the jelly thanks.
I can see the value in exploring texture etc but messy play is surely not an end in itself is it?