The playground design has been updated and now includes the worlds only DNA slide/ladder, well we think it is the worlds only one. There are more things to add including incorporating the periodic table into the design, chromosomes, molecules and many other things. One thing I found when looking at playgrounds was a very interesting project in Ghana, where a push roundabout has been built, which not only provides children with fun, but it also generates electricity to charge up LED lamps for use in the school and home, brilliant. We shall keep you posted. Also in researching playgrounds I have found some interesting sites and will list them for your information.