Is the usage of me and I correct in the following sentences? If not, what would be the correct way to say these sentences?

1. I wish I had known about these picture board systems then, as it may have enhanced the communication between the children and me.

2. It was frustrating for both the child and I, as I had to figure out what the child wanted.

1 answer

1. is correct.

2. is wrong.

The "child and me" are objects of the preposition "for." A quick way to determine the right pronoun is to omit the noun.

for I?
for me?