Core Insights - Roblox has announced an expanded collaboration with Mattel, which is expected to enhance user engagement through new games based on popular brands like Barbie and Hot Wheels [1][2] - The stock price of Roblox increased by over 3% to $138.21 following the announcement of the collaboration [2] - Despite the positive news, Roblox's stock has faced challenges due to concerns regarding child safety on its platform, leading to fluctuations in its stock performance [3] Company Developments - The new experiences from the collaboration will include a game based on Monster High, set to launch on October 24 [1] - Mattel's previous success on Roblox includes the "Barbie DreamHouse Tycoon," which has garnered nearly 500 million visits since its launch in 2023 [2] Market Performance - Roblox's stock had previously broken out of a cup-with-handle base at a buy point of $139.97 but later fell below its 50-day moving average, triggering a sell signal [3]