I recently picked up an addition machine from lakeshore learning.
Initially all the kids wanted to do was push the buttons and make silly faces and patterns with them but once I sat down and played a game showing them how it works they were hooked.
They both love picking a "problem", figuring the solution and then pushing the button to see if they got the answer correct. (then we say "ding ding ding" like a bell ringing)
https://www.lakeshorelearning.com/product/productDet.jsp;jsessionid=TTtRvm38XpywGJxhtGKsS1WnYFhgDn593JmdBBlT77wCkBnJGdHG!1260884706!1123339352?productItemID=1%2C689%2C949%2C371%2C895%2C970&ASSORTMENT%3C%3East_id=1408474395181113&bmUID=1314123217450
Our IF journey: 1 m/c, 1 IVF with only 3 eggs retrieved yielding Dylan and a lost twin, 1 shocker unmedicated BFP resulting in Jace, 3 more unmedicated pregnancies ending in more losses.
Total score: 6 pregnancies, 5 losses, 2 amazing blessings that I'm thankful for every single day.
Re: Educational product rave:
I had them too. I didn't even know they still sold them.