This looks like one of the most fun Outdoor Toys I have ever clapped eyes on. The Little Tikes Drop Zone may not be inexpensive, but this is no cheapo inflatable that's going to last five minutes. Get it for the best price of £87.99 (Was £109.99) from Very.
The Little Tikes Drop Zone works by loading up the Conveyor Belt with balls. This fulls the Bucket, and when the Bucket Cord is pulled, the contents spill onto the person below.
If you like, this can be used indoors, meaning it can be played with all year round. For outdoor play, attach it to the garden hose and it'll create a DOUBLE waterfall.
Delivery is FREE for those of you with a Delivery Pass, otherwise it's £3.99.