Quick Knot Water Bombs

I bought this to compliment the catapult set which turned out to be useless. This provided a good number of additional balloons and the quick fill nozzle is fine (although I got one with the catapult set so didn't really need another) but the "easy tie, quick knot attachment" was useless as it was far too big for the balloons which are really small and therefore impossible to stretch enough. Only really worth buying for the balloons. Why not just supply a number of sealing clips from the catapult set but plastic instead of cardboard - then the kids can fill the balloons themselves.