ABLE accounts are somewhat flexible. They allow the disabled to have up to $100,000 to use to supplement their benefits and still stay eligible for those benefits. It is not too difficult to get money into the accounts. A 529 educational savings account can be rolled into ABLE accounts. Some states even offer tax credits for putting money in an ABLE account.
One of the drawbacks to ABLE accounts, however, is that they can be tricky to set up properly to qualify under the law.
An estate planning attorney can advise you on creating an estate plan that fits your unique circumstances and may include leaving assets to a child with special needs.
Reference: Wills, Trusts & Estates Prof Blog (June 8, 2018) "ABLE Accounts Give Disabled More Financial Freedom."