The food part is the easy part. What actually decides how well a coeliac child does is whether the adults around them understand cross-contact, and whether the child has language they can use themselves when no adult is there.
Written for parents, and more about systems and social situations than about ingredient lists.

School is worth formalising. In the US, celiac disease is generally recognised as a disability under Section 504, which means a 504 plan can require accommodations: safe substitutes at lunch, advance notice of food activities, a policy on classroom parties, and a place to keep safe snacks. That is a legal instrument, not a favour, and having it in writing changes how consistently it is honoured after the teacher who understood it moves on.
Craft materials are the invisible one. Play dough is wheat flour. So are papier-mâché paste, some finger paints, and the pasta used in art projects. A young child with wheat dough on their hands will put those hands in their mouth. Gluten-free play dough exists and is easy to make.
The language matters more than the rules. A child who can say "I have celiac disease, that means I get sick from wheat, can I check the packet?" is far safer than one who has been told a list of banned foods. Teach the reason rather than the list. A list cannot handle a food nobody anticipated.
Watch for over-restriction too. Children of anxious parents in this situation are at real risk of a narrowed diet and a fraught relationship with food. The naturally gluten-free list is enormous, and the goal is a child who eats well and confidently rather than one who is afraid of the table.
Point CiCi at the barcode and get this same reasoning in about two seconds, plus the carbs and whether it has been recalled. 360,000+ packaged foods are already read and waiting.
Sorted by what the answer actually is, rather than alphabetically — because the useful question in a shop is “which pile is this in.”
Wheat flour. A major exposure route for young children.
Keep a safe treat in the classroom freezer so the child is never the one left out.
Wheat pasta and grain-based sensory bins.
A dedicated toaster or toaster bags is one of the highest-value household changes.
Shared serving utensils and shared fryers are the issue more than the menu.
Sending a labelled food box removes the need for another parent to get it right.
The rotation snack is a recurring risk. Being on the rotation solves it.
Makes accommodations enforceable rather than dependent on goodwill.
Fruit, cheese, yoghurt, eggs, rice, corn chips, plain meat, nuts.
A reason generalises to unfamiliar food. A list does not.
In US public schools, celiac disease is generally recognised as a disability under Section 504 of the Rehabilitation Act, so documented accommodations can be required through a 504 plan. Having it in writing matters because it survives staff changes in a way that an informal understanding does not.
Standard play dough is made from wheat flour and is not. It matters more than it sounds because young children handle it for long periods and then touch their faces. Gluten-free versions are sold, and a home recipe from rice flour or cornstarch works well.
A safe treat kept at school for surprise celebrations, being on the team snack rotation, and sending a labelled box to parties all mean the child gets to say yes rather than no. Children mind being singled out far more than they mind a different cupcake.
This site answers the question you knew to ask. The app answers the one you didn't: the barley malt in a rice cereal, the wheat starch in a gummy. Scan the barcode, or photograph the panel when the barcode isn't in any database, and CiCi shows which words on the label produced the answer.
14 days free, then $29.99 a year. Cheaper than Fig, and it does what three separate apps do. This website stays free forever either way: every answer on it, permanently, with no account.