If they are going to do it regularly and give it a proper form then they can do it otherwise there is no need to form a trust for such an amount.
Because if you form a trust and want 12A you need to have proper object, place of trust etc and then you register as trust and apply to CIT for 12A but it includes lot of expense.
You can even just form an AOP and collect donations and take deduction of such donation.
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