If your child has a peanut allergy there are alternatives.
Just about any type of nut can be made into a nut butter. It's as simple as grinding nuts in a food processor until they form a paste. Some nut butters will be creamy, others somewhat grainy. Higher-fat nuts, such as macadamia, will make a smoother but thinner butter. Almond and cashew butters work well for sandwiches or spread on apple slices.
Homemade nut butters have a short self-life, so make them in small batches. One cup of nuts will make about ½ cup nut butter. Store covered in the refrigerator for up to a month.