(AP)—Amazon.com Inc. is continuing its push into producing original children's series, ordering its sixth pilot of shows aimed at kids.

The announced Wednesday that it will make a for "Sara Solves It," an animated math-focused mystery developed by WGBH and Out of the Blue Enterprises. The show is the sixth pilot geared for kids by Amazon Studios, the retailer's original movie and series production arm.

Launched in 2010, Amazon Studios is moving toward presenting its pilots on its Prime Instant . Amazon says it will choose which series to greenlight for a full season based on viewer reaction. The pilots are expected to be posted this spring.

Amazon also has comedy pilots and movies in development.

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