Got one of these for the kids, lots of excitement.
First let down, mail in coupon for ants - or order form as it's known around these parts. Mail in coupon implies it's pre-paid and there's nothing pre-paid about this one.
Second let down, the gel pulls away from the sides and the ants just squeeze down there instead of tunnelling. Had one tunnel about 2" long until they noticed it was quicker to head down the sides. Certainly never got anything like the pictures.
Third let down, having travelled straight down the sides the ants did make a chamber at the bottom to live in but the optical properties of the plastic tank meant you couldn't actually see them unless you picked up the tank and looked in from below. We had already spent two weeks telling the kids never to pick it up so this meant they never got to see the ants.
Fourth let down, after about 6 weeks the gel goes moldy and kills the ants.
Fifth let down, the gel is not replaceable (well there seemed to be some american sites or a 'homebrew' recipe, both of which had mixed reviews) You can't buy a replacement gel pack and start afresh.
Finally - so what happened, basicaly, it's landfill there doesn't seem to be anything else you can do with it.