classroom display for Spanish

I have just put together display for sprucing up classroom at start of term- have had them laminated A3- For years I have been putting up classroom language signs and then failing to sustain insistence that they use the phrases so I have distilled it down to absolute minimum on one poster and have decided to challenge them to keep it going all year. Meetings and greetings- not all that clever really but again just to see if I can get them to say hi in Spanish spontaneously if the constant reminder is on display