Alok Menghrajani

Previously: security engineer at Square, co-author of HackLang, put the 's' in https at Facebook. Maker of CTFs.

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Buildnext is a free web tool that takes your LEGO inventory (list of sets by their identification number) and calculates the list of LEGO sets you can build with a link to Most sets have downloadable instructions either directly on or on one of the other popular sites (such as,, or

Hopefully, this tool will give you even more hours of fun with your LEGO and kids.