I didn't meant to rubbish it entirely but if it is the same bus that visited the Horniman recently its not the most accessible of child friendly ' places' which defeats its no doubt excellent purpose.
When a friend and I tried to use it at the Horniman we found it hard to get upstairs with non mobile babies and bags and they said we couldn't use the lower floor, so we left a little bemused about the purpose. Buggies had to be left outside unattended and out of sight where it was difficult to keep an eye on them. Maybe its more appropriate for older toddlers who are able to walk?