Mattel, Houghton Mifflin Harcourt, JF Shea and Collab+Sesame have contributed to a $24m funding round for internet-connected toy maker Osmo.

US-based internet-connected toy and robot producer Osmo has raised $24m in capital from investors including toy company Mattel and educational publisher Houghton Mifflin Harcourt, TechCrunch reported yesterday.

Collab+Sesame, an investment vehicle operated by children’s TV producer Sesame Workshop, Collaborative Fund and Calibrate Partners, also took part, as did Accel Partners, Upfront Ventures and K9 Ventures.

A subsequent press release revealed the round also included Shea Ventures, the corporate venturing arm of real estate developer JF Shea.

Osmo, founded in 2013…