Rubik Bubbles
Google Fonts · Philipp Hubert & Sebastian Fischer · 2022

Rubik Bubbles renders each letterform as if inflated with air, creating a distinctly bubbly, cartoon-friendly display face.
About
Built on the geometric bones of Rubik, this variant replaces solid strokes with overlapping spherical forms that suggest lightness and fun. It suits children's branding, party graphics, and social media visuals where an exuberant, youthful tone is needed. Its broad script support across Cyrillic and Hebrew makes it unusually versatile for a novelty face.
Classification
A decorative variant of Rubik with letters formed from overlapping bubble-like circular shapes, giving a buoyant, inflated appearance. The rounded geometry creates a playful, cartoonish aesthetic.