So I was looking for a stroller to fit in the Model 3 frunk and found two models that do. 1. GB Pockit Stroller 2. Babyzen Yoyo I tried out the Pockit stroller at BuyBuyBaby. And though it's much smaller folded up than the Babyzen Yoyo (I believe you can fit even 2 of these into the Model 3 frunk), it's really a compromised stroller. The wheels and frame seem rickety and the canopy and basket are way too small. So I ordered the Babyzen Yoyo Stroller and it fits perfectly! And it's a great stroller to boot, comfy to push with a great big canopy. Here's a picture of it in the frunk.