Sims 4 to Sims 3 conversions

ATS3 has some TS4 to TS3 conversions over there... :)
https://aroundthesims3.com/objects/sims4to3_conversions_index.shtml

~evil grin~

The notorious ballpit.
https://simsvip.com/wp-content/uploads/2017/08/DH9v-YCXUAE5SVH.jpg
https://thumbs.gfycat.com/PowerlessForcefulBrownbutterfly-size_restricted.gif

Luckily they improved it...
https://simsvip.com/wp-content/uploads/2017/09/09-12-17_1-33-28-PM.png

Around the Sims version of the TS4 ballpit for TS3.
https://aroundthesims3.com/objects/images/kids_ballpit/prevue_big.jpg
https://aroundthesims3.com/objects/room_nursery_22.shtml

Here's a few other places:

https://ts4tots3conversions.tumblr.com/
https://venusprincess.wixsite.com/venusprincess/ts4-to-ts3-conversions
https://pinkdahlianow.wixsite.com/pinkdahlia
https://sketchbookpixels.tumblr.com/post/171968838770/update-the-ts4-to-ts3-conversion-of-elliesimples