Kajeet, a Bethesda, Md.-based mobile virtual network for kids and tweens, has raised $36.8 million in Series B funding. DFJ Growth Fund led the deal, and was joined by return backers Bessemer Venture Partners, Fidelity Ventures, Gabriel Venture Partners and InterWest Partners. Randy Glein of DFJ Growth joined the Kajeet board of directors. www.kajeet.com