Cress must be the easiest plant to grow with children, very short germination time with shoots appearing within a few days. We just cut a few pieces of kitchen roll into a J for Joshua, wet it and sprinkled with the seeds. Kept it damp and gave it some light and hey presto within a few days shoots started appearing and we had one very excited little boy. The world is your oyster you can do any shape you fancy. I wonder what shape we will do next.