Top critical review
One person found this helpful
bright lights, but require too much force, and red is not ideal colour
on 21 July 2014
The balls may be yellow but the lights are red and flash in a strobing kind of way so caution should be taken with those with epilepsy ( no warning on the packet)
you have to hit the balls rather hard to make the lights come on, however the cats were not too bothered by the lights so no big loss.
They are slightly smaller than the non-lighting balls that come with the circuits, so move through the run more easily.
it is OK, but really you could buy some balls from the discount shope ( pound / 99p, wilko's or supermarkets) which would fit, and they would be just as interesting for the cats.