From the readings I have done, Frigg’s main offerings are done through service:
Working with children, helping fellow mothers, comfort and love to others in a motherly way, even if they are not one’s children. Milk, mead, pastry, and light fruit wines are other offerings. To craft with sewing or wool can also be offerings, as Frigg is the weaver of the clouds.
Frigg values kindness and work, in that order. Being kind to one another, and doing a thorough detailed job, both of which I like to believe I do on a daily basis.