With Riyadh temperatures soaring to 50 degrees celcius and more in the summer months, families have to find indoor activities and you will find that the vast majority of Riyadh's numerous shopping malls will have children's play areas incorporated. The one pictured below is at the fairly new Hayat Mall in Riyadh and has a good variety of games for children of all ages - merry-go-rounds, trampolines and trains for the littlies, a decent roller coaster and ice rink for the older children among other things. It all makes for a welcome afternoon out together. Better to go in the afternoon and leave by isha prayer as isha is when the malls and play areas become particularly busy.
My 12, 10, 7 and 4 year olds all enjoyed having a go at the sand art where you choose a picture and piece by piece peel off the backing paper to reveal a sticky section on which to apply different coloured sands.