Easy and fun.Velcro + popsicle sticks make for great quiet time or restaurant activity. Put velcro dots on the ends of popsicle sticks. Kids can make letters or shapes over and over again. I found velcro dots at my local dollar store.
DIY Ring Toss Game This one is fun for any age! The further you stand back, the harder it gets. You could even mark lines in the yard and assign each one with a different point value to make it more challenging and entertaining!