## image model

named_scope :first_three, :limit => 3, :order => created_at ASC


## view

<% @galleries.each do |gallery| %>
   <% gallery.images.first_three .each do |image| %>
       <%= link_to image_tag(url_for(:controller => 'images', :action => 'show_thumb', :id => image.id)), gallery %></td>
   <% end %>
<% end %>