Please help me fix the avocado creatures my daughter made for me this summer

My daughter went to summer camp and made these ‘avocado seed creatures’ for her and I that she was really proud of because it represented us as a mom and daughter. I adore them

The problem: she had to leave summer camp early due to illness, and the one on the left was kiln fired and she brought the the one on the right home as dry clay. It unfortunately cracked and she thinks it was forever broken. I used a small paintbrush and wet it and fixed it by rewetting the surrounding clay and blending it I want to surprise her and finish the second little guy but know nothing about clay. They mean a lot to me! Now that I fixed the crack- what can I do to finish it? Is it possible in an oven? Or could I seal it some way?

Thank you so much!

From, Avocado mom

My daughter went to summer camp and made these ‘avocado seed creatures’ for her and I that she was really proud of because it represented us as a mom and daughter. I adore them

The problem: she had to leave summer camp early due to illness, and the one on the left was kiln fired and she brought the the one on the right home as dry clay. It unfortunately cracked and she thinks it was forever broken. I used a small paintbrush and wet it and fixed it by rewetting the surrounding clay and blending it I want to surprise her and finish the second little guy but know nothing about clay. They mean a lot to me! Now that I fixed the crack- what can I do to finish it? Is it possible in an oven? Or could I seal it some way?

Thank you so much!

From, Avocado mom