Here’s a simple indoor activity that’ll take you 5 minutes to setup and will keep an 8-10 month old occupied for awhile! You’ll need a laundry basket (or any kind of basket with a mesh-like structure), a bunch of ribbons / sashes / cords / etc, and some fun sensory toys for your baby to search for. Things with bright colors, some sound, anything grab-able would be idea for a kid of this age. As you can see, I added a round ball with low grip in there and it was really hard for my baby to take it out.
All you have to do is place the toys inside and tie all your ribbons etc in a hap-hazard manner. You can go crazy and decorate it as well as you can – make it attractive! Then, allow your child to dig and search for the toys. Once she’s done searching, she’ll have more fun playing with them knowing that she did the task of finding them! I remember the look of pride on A’s face every time she found a toy.
Try this out, and let me know what variations you did!