Children pass with hooks

I have my son (4 years) given this syringe pump with Easter.
He is very excited about this syringe and has already half the neighborhood so that "shot".
We have an original Rolly toys slurry tanker that is kompartibel with this syringe. When threading the pump in the upper opening of the slurry tank, which is virtually impossible for small children's hands, we have damaged the hose already within a week 3x. The hose had to be shortened at the bottom of each!
Because, the pump has to be removed each time filling the slurry tank, the hose has only a shorter lifespan. I hope you can reorder it as a spare part!
Meanwhile, my son runs the manure pit pump for a walk and uses them only rarely.
Too bad I find this product otherwise very good.