Place the watermelon chunks into the blender jar.
Blend the watermelon on high speed until completely smooth, about 30 seconds. Observe the mixture turning into a vibrant, semi-opaque liquid and small seed bits distributing evenly.
If the mixture is too thick, add water gradually and blend again until the texture is pourable but still thick. The final, smooth consistency should be slightly thick but flow freely.
Pour the blended watermelon mixture into the ice pop molds, filling each cavity almost to the top. Ensure an even distribution of seed bits in each mold.
Insert the sticks into the molds and secure the lids or cover with plastic wrap, then freeze at 0°F (-18°C) for at least 4 hours or until solid and firm.
Once frozen solid, remove the popsicles from the molds by briefly running warm water over the exterior and gently pulling them out. Serve immediately for a crisp, refreshing texture.
