These work great! Did them for a school science night using smaller bottles. They look like lava lamps. - Fireworks in a bottle - looks fun and easy! bottle of water, oil, coloring (food coloring, paint), alka seltzer.
So neat - Wedding Food Ideas - Bonfire Night is a UK thing, but these could also be for the of July. Not sure if I can get the chocolate finger biscuits in the US though. Maybe choc covered pretzel sticks would work?
Crackle Foam POPS and fizzles between fingers while kids play. Make foam mountains, build popping towers, or hold crackling clouds in your hands. Sensory play with sound effects- SUPER FUN! Shaving cream and pop rocks candy