Hola Jodie,
Yes, I'm sure this type of games can be really helpful for children (S�, estoy segura de que este tipo de juegos puede ser realmente de ayuda para los ni�os).
About your question (Sobre tu pregunta):
El verbo would be ser�an - explica por favor. Ok, this is the conditional tense, both Spanish and English verbs. So, when we use the English conditional "would", it corresponds in Spanish to the conditional tense. In this case, it is "ser�an", plural, as the subject of the sentences is plural (ni�os-children).
To know more about Spanish conditional tense check this:
Conditional Tense - Studyspanish.com And, about your questions:
Como se dice, �I would like an ice cream please? Dice �Quiero un helado por favor?
Dice Quiero - I want? Following the use of the conditional, for "I would like an ice cream" we should say "Querr�a un helado, por favor", but doesn't sound very coloquial, so, as you sayd, we usually use the present tense: "Quiero un helado, por favor".
And yes, "quiero" = "I want".
You can use, of course, "querr�a un helado", but "in real life", use simply the present tnese "quiero".
You should use the conditional in special ocassions, as a polite form.
Hope this helps!