I thought i was the only one having a early baby shower :) but One game is measuring the belly . Everyone cuts a piece of yarn and guess an estimate of how big your belly is and the closest one wins
Try melting different chocolate bars in diapers and having your guests guess which is which for a prize. Or change a dolls diaper blindfolded, or with one hand behind your back. We also played the name game. Everyone starts with a binki necklace, and loses theirs if they say the word baby. Person with the most at the end of the shower wins