I really love this concept of mini vases or pots of tiny fresh flowers for each guest as part of the table setting. It brings so much color and life to the table when looking at all of the flowers together, and it add such a warm personal touch to each individual setting, especially if you add in a name plate.
For kids, to keep them busy at the table as you get dinner ready is these washable chalkboard placemats. You can use chalk, dry erase markers or chalk markers on them and they wipe off clean. You could also use them for adult parties or dinners to label different cheeses, etc. There are all kinds, and I found these on Amazon.