Mentioned by www.kiddieholidays.co.uk
21 Things To Do In London With A Toddler For Under ÂŁ5
"The Science Museum has sections specifically for preschool children. The Garden is an interactive gallery based around water, light, sound and construction where toddlers can learn about floating, sinking, shadows and reflections. The Pattern Pod is a multi-sensory area for children aged under 8, which encourages children to recognise and copy patterns."