Tama ba na gumastos ng sobra sa 1styear old ng anak mo kung hinde naman niya maeenjoy?

If you have the means, go for it. My personal take, it doesn't matter kung aware na si baby or hindi. What matters is the effort exerted by all the people who love him/her to make the first birthday celebration really memorable, which could also entail malaking gastos talaga, depending on how you'd want to celebrate it.