Make a Japanese Doll to celebrate Hinamatsuri - the Japanese Doll Festival
There are Emperor and Empress dolls here http://www.tammyyee.com/origamidoll.html
Or Kokeshi dolls here http://www.activityvillage.co.uk/kokeshi-doll-printable - Have to be a member of the website to download the printable. Try this https://www.flickr.com/photos/jacquedavis/4309050127/sizes/l instead if it does not work.
Coloured pens, scissors, tape
Print out the templates and colour as necessary. Cut out an assemble as per the instructions.
Choose the doll that your Pippins will manage - you know your girls best.