It has chosen Wednesday as Gifted and Talented Awareness Day. It is encouraging schools and companies to promote the message 'It's Alright to be Bright' by asking children and staff to wear brightly coloured clothes and to make donations of £1.
Stephen Tommis, director of the association, said bright children deserved to benefit from fundraising campaigns.
"Many bright children feel they cannot shine as brightly as they should," he said. "Without support, these children's gifts will die and they will never reach their potential."
The charity, which celebrates its 40th anniversary this year, operates a free helpline for the families of gifted children and lobbies on their behalf.