I presume you are looking for something for an older child? Anyway we bought a nice timber sand box/ pit in Argos for our 1 1/2 year old and she loves it. For about €70 (including sand, bucket, spade etc etc) your little darling can be entertained for hours! It grieved me a little to pay for something I could so easily have made myself (and better) but when you factor in purchasing materials (time and money), transport, child friendly paint/ treatment for the timber and actual construction time it is very hard to justify making this sort of stuff yourself.