Find all main conferences and exhibitions about education in US and Europe

We are developing an innovative chemistry experimental set for children and we need to build a list of all conferences and exhibitions that could be potentially interesting for us. The following conferences and exhibitions should be included: * About science education, particular about innovations in science education * Toys, particular science toys * Science conferences and exhibitions and have education section * Anything with keyword STEM Location: - US - EU The result must be Excel file with the following colums: * Name * Date * Country, state, city * URL * Type: exhibition/conference/conference+echibition/other * Number of exhibitors * Estimated number of attendants * Brief description * URL with list of exhibitors (if applicable) * URL with list of speakers (if applicable)