Grilled chicken and vegetable skewers are a healthy and delicious option for a kids' birthday dinner. Cut chicken breast into bite-sized pieces and marinate them in a mixture of olive oil, lemon juice, garlic, and herbs. Thread the chicken pieces onto skewers alternating with colorful vegetables like bell peppers, cherry tomatoes, and zucchini. Grill the skewers until the chicken is cooked through and the vegetables are tender. Serve them with a side of rice or a salad for a well-balanced meal.