Please list the business IDs of all the Yelp_Businesses that are good for kids.
good for kids refers to attribute_name = 'Good for Kids' and attribute_value = 'true'

SELECT T2.business_id FROM Attributes AS T1 INNER JOIN Business_Attributes AS T2 ON T1.attribute_id = T2.attribute_id WHERE T1.attribute_name LIKE 'Good for Kids' AND T2.attribute_value LIKE 'TRUE'