I made the Flexi Heart as designed by Dcfrizzle (https://www.thingiverse.com/thing:2898042). Thx Dcfrizzle for sharing!
Once printed I found that the 1st and 2nd piece and the 3rd and 4th piece were bonded together due to an error in the design. Quickly fixed it, added some text to it and uploaded it here. Also scaled it down a bit and it still works well.
For mothers day...?