> It's €20 for 2 kids to have 2 minutes of fun […] They play with it for a day […]

Seems to me it's €20 for a day (8h? 16h?) of fun. That's not bad value: how much does a movie ticket cost for 2-3 hours?

In fact it's the same thing. I said fish by mistake (probably because my mind made an association with the fishing rod and what it's usually used for) but they're ducks. I have edited the comment now.